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Jwilson
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Registered: ‎11-11-2020

RFSoC GEN3 Nyquist zones

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Wanted to double check that i am understanding this correctly, for the GEN3 RFSoC (ZU48DR) the sampling rate is 5.0GSPS and the analog input bandwidth is 6GHz. So the first Nyquist zone is 0-2.5GHz, the second Nyquist zone is 2.5-5.0GHz and the third Nyquist zone is 5.0-7.5GHz. Since the analog input bandwidth is limited to 6.0GHz we won't be able to operate in the third Nyquist zone entirely but will be limited to 5.0-6.0GHz. I have seen a lot of Nyquist related questions in the forums already for the GEN1 and GEN2 parts, it seems like you need to tell the RFSoC which zone you are operating in, for GEN3 does this exist still and is there a 3rd Nyquist zone option?

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pthakare
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Registered: ‎08-08-2017

Hi @Jwilson 

Yes ,  3rd Nyquist zone can also be used upto signal meets the RF-ADC input bandwidth requirements. Zones 1, 3, 5, ... are referred to as odd zones, and zones 2, 4, ... are referred to as even zones.

In IP or using APIs 1 corresponds to odd Nyquist zones and 2 corresponds to even nyquist zones

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2 Replies
pthakare
Moderator
Moderator
747 Views
Registered: ‎08-08-2017

Hi @Jwilson 

Yes ,  3rd Nyquist zone can also be used upto signal meets the RF-ADC input bandwidth requirements. Zones 1, 3, 5, ... are referred to as odd zones, and zones 2, 4, ... are referred to as even zones.

In IP or using APIs 1 corresponds to odd Nyquist zones and 2 corresponds to even nyquist zones

-------------------------------------------------------------------------------------------------------------------------------
Reply if you have any queries, give kudos and accept as solution
-------------------------------------------------------------------------------------------------------------------------------

View solution in original post

klumsde
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Moderator
724 Views
Registered: ‎04-18-2011

Hi @Jwilson @pthakare 

Remember that you set this in the IP

But what this really does is for ADC it defines the location of the bulk of the signal power for the ADC calibration

For a DAC setting the Nyquist Zone defines if the DAC is in Mixed mode or not

 

Keith 

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